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I have a 1999 Yamaha 200 OX66. It runds fine until I get on a plane. I replaced the water pump kit thinking it may not be pushing water to the top of the engine but the problem continues. Any suggestions?
Do you have a good flow from your tell-tale? Thermostats changed? Pressure relief valve not obstructed? Is this a new problem? Anything new hangin off the back of your boat, like a transducer?
It is definitely the temp light that comes on. I have replaced the water pump kit, the thermostats, and this is a new problem. Where is the presure relief valve.....I have removed the head covers for cleaning today.
if the t-stats and water pump are good, and the presure valve is clean then next step is head and watercover removal.<br /> the pressure control valve is low on the stbd side of the ex cover.
